Milnor 72072, Руководство пользователя

Страница: 105 / 119

Ë S
te
p
3 –
Se
tt
ing
Main Air
Pressur
e S
w
it
c
h
CRUS
HING A
N
D ENTA
NGLEMENT
HAZARD—R
o
ta
ti
ng m
a
c
h
inery
can
entangle
a
nd c
rus
h body
pa
rt
s
.
Kee
p
a
w
a
y
fr
om rotati
n
g
belt
s
an
d pu
lleys.
En
sur
e
blow
er
motor bel
t guard is i
n
pl
ace at
al
l tim
e
s.
NOTE
:
Adjus
t the Main Air Pr
essure swit
ch very sl
owly, allowing time
fo
r air pressur
e to drop
.
1.
Connect one
side of the man
o
m
eter (low pressure side of differ
ential pressure gauge) to the
Main Air Pr
essure
Gauge point needle valve
(Q2, FIGURE 9)
; l
eave the other side open to a
tmosphere.
2
.
V
eri
fy that
there i
s 2" of vacuum a
t the
Main A
ir Pre
ssure
swit
ch
(Z, FIGURE 9)
. M
ake nece
ssary adj
ust
-
ment
s to Main Air Bl
ower damper clevis
arm a
nd air cyli
nder st
op nuts
on top of dryer. Do not all
o
w the
clevi
s arm
to s
trike the blower housing.
3.
Adjust
the need
le valve
(Q2)
to achieve the value shown in
FIGURE
7. Slowly turn the Main Air
Pressure
swi
tch
(Z)
adjus
tm
ent s
crew clockwi
se unt
il
the M
ain Ai
r st
atus
light i
lluminates
MOM
E
NTARILY, the
swi
tch t
rips, and the burner ext
ingui
shes. Push Safety Rese
t and Si
gnal C
ancel
to res
et. Whi
le
the flam
e con
-
trol
is
resett
ing, turn the adjus
tmen
t
screw one turn counter-clockwise, then a
fter the burner
fi
res, gradual
ly
turn the adju
st
ment
screw clockw
ise u
n
ti
l the
swit
ch trips again.
4.
Aft
er set
ting swi
tch, turn the need
le valve
(Q2)
ful
ly count
er-clockw
ise to secure.
Ë St
ep
4
– S
e
tt
ing
Pilo
t G
a
s Fl
ame
Connect
one
side
of
the
ma
nomete
r
(low press
ure
si
de
of diffe
rential
p
ressur
e gauge)
to
the
Pi
lot
Gas
P
ressure
Gauge point
(E)
; l
eave the other
side
open to at
mosphere. R
emove
Pi
lot
Gas
F
lam
e valve top s
crew (F
IGURE
11),
and turn adjust
ing s
crew to achive Pilo
t Ga
s Fla
m
e v
alue in FIGURE
7.
Ë S
te
p
5 –
Se
tt
ing Regu
la
ted
Ga
s Pr
essu
re
NOTE 1
:
If the High Gas
Pressure sw
itch
(K)
trips during thi
s procedure, turn the adju
stme
nt screw one
turn clockwise
, then press
Sa
fety Re
set a
nd Signal Ca
ncel.
NOTE 2:
If the Low Ga
s Pressure s
w
itch
(L)
trips during thi
s procedure, turn the adju
stme
nt screw one
turn clockwise
, then press
Sa
fety Re
set a
nd Signal Ca
ncel.
1.
Connect one
side of
manome
ter (high pr
essur
e side of
differe
n
tial p
ressure gauge) to Low Gas P
ressure
Gauge point
(Q1)
Low Gas
Pressure sw
itch
(L)
; l
eave the other side open to a
tmosphere.
2.
Open M
anual Tes
t valve
(R)
fully.
3.
Adjust
Main
Gas
regul
ator
(W)
to achieve value in
FIGURE 7.
Ë S
tep 6 – Setting Burner Minimum Fire
Turn
the Modulat
ing Gas Valve
Minimum F
ire
Potent
iom
e-
ter
adjus
ting s
c
rew (FIGUR
E
13) fully
c
o
u
n
te
r-
clo
c
k
w
is
e
.
Slo
wly t
u
rn
c
lockwi
se unti
l v
alu
e c
alc
ulated from data on the
dryer s
ett
ing plat
e
appears on control
panel di
spl
ay
as
shown in
FIGU
RE 15. After
making an adjus
tment, wai
t for the d
isp
lay to
se
tt
le
.
Ë S
te
p
7 –
Se
tt
ing High
Ga
s Pr
essu
re
Swi
tc
h
NOT
E 1:
S
et a repl
aceme
nt
High G
as
Pressur
e Sw
itch
fu
lly
clockw
ise
before
inst
all
ing, then adjus
t a
s
below.
1.
At
tach one
side of
manome
ter (high pr
essur
e side of
differe
n
tial p
ressure gauge) to the High
Gas P
ressure
swi
tch
(K)
; l
eave other
side open to atmosphere.
2.
S
tart
with
Manual T
est
valve
(R)
open. S
lowly clos
e thi
s valve unti
l value shown in FIGU
RE 7 i
s read on ma
-
nomet
er. Gradually turn the High Gas Pr
essu
re swit
ch
(K)
adjust
m
ent
screw count
er-clockw
ise u
n
ti
l the
GAS
PRE
S
SU
RE HIGH
stat
us lig
h
t illuminat
es M
O
MENTARILY, the sw
itch
trips, and the burner ext
in-
guishes. Push S
afety R
eset
and Signal C
ancel to reset. Whi
le the f
lame c
ontro
l is r
ese
tting,
turn the adjust
-
ment
screw one turn clockwi
se, then after the burner fires, gradually turn the adj
us
tmen
t screw
counter-clockwis
e unti
l the swi
tch t
rips
again. Veri
fy the s
ett
ing by opening the M
anual Tes
t
valve
(R)
fully, then closing the valve whil
e watching the m
anomet
er. The High Pressure switc
h
should tri
p when the
set value i
s reached.
3.
R
eopen Manual
Test valve
(R)
ful
ly.
TICHTOC LDA MVP BSPP XXX+XXX X2X 000 XXXX
Adjust unti
l (TIC
) calcu
lated from
nam
eplat
e value i
s reached
Î FIG
U
RE 15
(M
S
S
M0
137AE)
Î Matchi
ng the D
isp
layed
Value
with
Nameplate
G
A
S
AND AIR A
D
JU
ST
M
E
N
T
S F
O
R
720
7
2 GAS DRYERS
MSS
M
0137AE/
9
911
A
V (8 of 9)
101